Abstract
Theoretical analysis indicates that partially deuterated ammonium dihydrogen phosphate (DADP) crystal with a deuterium content of 25% can realize spectral noncritical phase-matching (S-NCPM) for type-I frequency doubling of a Nd:YAG laser. With the point seed aqueous solution method, this crystal was successfully grown with high quality and large dimensions (7×7×6 cm3). Using an OPO laser as the tunable light source, its wavelength for type-I S-NCPM frequency doubling is determined to be 1063 nm, which coincides with the wavelength of a Nd:YAG laser (1064 nm) quite well. Further calculation predicts that a 17% deuterated DADP crystal can realize the type-I S-NCPM frequency doubling of a Nd:glass laser (1053 nm). Our research proposes that DADP is a promising new S-NCPM material for nonlinear optical (NLO) frequency conversion of 1 μm broadband lasers.
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